Well swab



2 Sheets-Sheet 1 .igmln dttotmq H. R. STANDLEE WELL SWAB 'Filed Sept. I6, 1929 Oct. 18, 1932.

Oct. 18, 1932.

H. R. STANDLEE 1,883,053

WELL SWAB 2 SheetsSheet 2 Filed Sept. 16, 1929 gwvenroz Patented Oct. 18, 1932 I UNITED STATES. PATENT OFFICE HARVEY R. STANDLEE, F TULSA, OKLAHOMA, ASSIGNOR TO THE GUIBERSON CORPORATION, OF DALLAS, TEXAS, A CORPORATION OF DELAWARE WELL swan Application filed September 16, 1929. Serial No. 392,883.

This invention relates to new and useful improvements in well swabs.

One object of the invention is to provide an improved swab which may readily be-released if stuck in the well and also positively and easily relieved when overloaded or when vide a swab in which the parts are strongly: united and prevented from falling into the.

well if disconnected.

Still another object of the invention is to provide a swab in which the swabbing collars are swiveled to the head thus making for free action and preventing unscrewing due to rotation or twisting of the line.

Among other objects of the invention are: The provision of a maximum fluid passage through the swab; a bottom valve permanently attached to the stem and on which the swab assembly is swiveled; and one in which the parts are readily replaceable.

Another object of the invention is to provide a swab collar capable of withstanding wear as well as the tremendous pressure and loads of such work, without blowing out or sticking in the well.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings in which an example of the invention is shown, and wherein:

Figure 1 is an elevation of a swab constructed in'accordance with the invention.

Figure 2 is a vertical sectional view of the same in a casing.

Figure *3 is a plan view of the same.

Figure 4 is an enlarged horizontal crosssectional view taken on the line 44 of F igure 2.

Figure 5 is an enlarged plan view of one of the swab collars.

Figure 6 isa side elevation thereof.

Figure 7 is a partial vertical sectional view of said collar.

In the drawings the numeral 10 designates a support or assembly sleeve which has at its central portion a separator or spacer 11 which includes a cylindrical band or member 12 surrounding the sleeve and secured thereto by a horizontal circular web 13 intermediate'the ends of the band. The spacer may be fastened to the sleeve, which is prefera le, or it may have a sliding fit thereon.

Above the web the spacer has an upwardly and outwardly flaring annular seat or socket 14; while below the web a downwardly and outwardly flaring seat or socket 15 is formed. The web is slightly below the center of the band thus making the socket 14 deeper than the socket 15 and permitting each to have a different flare.

I have shown two swab collars A and B. More could be used by lengthening the sleeve and adding spacers. The collars are dupli cates and as is shown in detail in Figures 5, 6 and 7 each includes an intermediate annular bowed zone or swabbing band 16 and reduced shanks or taper spuds 17 and 18 respectively. I

It will be noted that the shank 17 is shorter than the shank 18. The collars are slippedis held in place-by a nut 22 threaded on the 1 upper end of the sleeves By removing the nut 20 or the nut 22 either collar may be removed and replaced.

sure and expanding the collars into engag--' ing with the well wall.

In order to reinforce the collars A and B each has a circumferential insert in its body extending from the band into the shanks and com osed of layers 25 of fabric or the like.

At t e intersection of the band 16 and the lower shank 18, circular strips or bands of wire mesh 26 are interposed between the fabric layers. The tendency to blow out is at this point and thus the added reinforcement.

The upper end of the sleeve 10 above the nut 22 is slotted vertically to form a cage 27. A tubular bushing 28 freely slidable in the cage is screwed into the lower end of a sub or head 29. A socket 30 is provided in the sub above the bushing.

A flexible stem 31 formed of a length of steel cable or other suitable material is extended axially through the sleeve and bushing and suitably fastened in a cap 32 loosely confined inv the socket 30. A valve 33 having a semi-spherical head 34 is secured on the lower end of the stem in position to engage an annular inwardly bevelled seat 35 on the lower end of the nut 20.

The stem 31 is suspended from the sub 29 and is swiveled in the bushing 28. The sleeve 10 and swab assembly is supported on the head 34 of the valve 33. The bushing 28 is less in diameter than the interior of the cage and this with the mounting on the valve head gives a swivel mounting to the sleeve and swab assembly. Rotatably mounting the stem in the bushing prevents twisting and spinning of the supporting cable from, being transmitted to the swab.

The entire structure is comparatively short and owing to the flexible stem and swivel connections will readily pass through crooked holes and will not be likely to hang up. The whole structure will he strpng, particularly the valve and mandrel. The sub 29 is provided with a pin 29 at its top for connection to a socket on the end of a cable line.

When the swab is lowered into the well below the liquid level the slotted cage 27 will admit fluid to the sleeve 10 and the liquid will flow through the ports 24 into the chambers 23. Upon lifting the swab the liquid will exert suflicient pressure to expand the collars A and B and cause the bands 16 to frictionally engage the wall of the casing or tubing. By pulling the swab upwardly in the well all liquid above it is also lifted.

Frequently the swab is lowered to such a depth that the liquid above it forms too great a load to lift and the frictional contact between the collars becomes so great, due to the internal pressure, as to cause the swab to stick. If this should occur with the swab herein set forth, it is merely necessary to slack up the line so as to allow the valve 33-34 to drop from the seat 35, thus bleeding or unloading the swab, which frees the collars.

.If any of the parts should become unfasof the appended claims.

What I claim, is:

1. A swab including a tubular support provided with a fluid-admitting aperture in its side wall near its upper end and a. valve seat at its lower end, a collar carried by the support and expansible under the influence of fluid pressure in the support, a sub adapted to be connected to a sucker rod andhaving a. tubular extension axially slidable in the upper end of the tubular support, a stem secured in the sub and extending axially 4 through the extension and the tubular support, the flexibility and tensile strength of the stem being at least approximately the same as a stem of the same cross sectional area composed of a plurality of steel wires, i

and a valve secured to the lower end of the stem and adapted to seat against the valve seat.

2.- A swab including a tubular support provided with a fluid-admitting aperture in its side wall near its upper end and a valve seat at its lower end, acollar carried by the support and expansible under the influence of fluid pressure in the support, a sub adapted to be connected to a sucker rod and having a tubular extension axially slidable in the upper end of the tubular support, a flexible stem secured in the sub and extending axially through the extension and the tubular support, the flexible stem being composed of a plurality of metal wires, and a valve secured to the lower end of the stem and adapted to seat against the valve seat.

In testimony whereof I affix my signature.

HARVEY R. STANDLEE. 

